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Residential Energy Consumption Survey data show decreased energy consumption per household - Today in Energy - U.S. Petroleum & Other LiquidsCrude oil, gasoline, heating oil, diesel, propane, and other liquids including biofuels and natural gas liquids.
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InternationalInternational energy information, including overviews, rankings, data, and analyses. The larger sample size for the 2009 RECS allowed for the release of data and comparisons to be made for 16 individual states.
RECS characteristics data, released in early 2011, showed an increasing number of televisions, computers, and other electronic devices that add to household plug loads as well as the greater use of energy-efficient appliances.
Based on the ratio: energy consumption by end uses divided by the number of permanently occupied dwelling. The energy consumption of households is decomposed in different explanatory effects: change in average dwelling size, increasing number of appliances (more electrical appliances) and central heating diffusion, energy efficiency improvement (as measured from ODEX) and change in behaviour related to more confort.
Over the period 1990-2009, energy efficiency in the household sector increased by 24%, at an average rate of 1.4% per year (Figure 1). For the EU-27 as a whole, new dwellings built in 2009 consumed about 40% less energy than dwellings built in 1990, because of new building codes[3] (Figure 9). Over the period 2005-2009, the average energy efficiency improvement rate at EU level was 1.3% per year. Space heating represented 68% of total household consumption in 2009 compared to 74% in 1990. To avoid yearly fluctuations due to climatic variations from one year to the other and have consistent trends, the household energy consumption should be measured at normal climate (i.e. The observed progress in energy efficiency was due to better thermal performance of buildings, more efficient large electrical appliances (cold and washing appliances) and heating systems (condensing boilers and heat pumps). Energy consumption for water heating represented around 12% of the household consumption in 2009.
Solar energy is promoted in many countries to substitute conventional energies presently used to produce hot water. In France there is an energy saving obligation for energy suppliers above a certain level of sales. A previous article on this site looked at the first part of that answer, how much energy your solar cells will produce.
They told us what we use our energy to power, when we use it, what uses most of it and also some hints on how to use less. The graph below shows the amount of power being used by an average home, and generated by an average  solar PV system at any point in time during an average summer’s day. The average production of a solar PV system in Sydney has been calculated using the online performance calculator for a grid connected system; PVwatts.
In a state with a net Solar Feed-in Tariff in place (where you are credited for the surplus electricity you export to the grid) the home with the above graph would have no Feed-in Tariff income. The dashed green line shows the electricity generation of a 3kW grid connected solar system.


In winter, the expected solar PV average generation curve is slightly lower than in summer, reflecting the lower intensity of the sun. Although NSW once had a gross Solar Feed-in Tariff under the state’s Solar Bonus Scheme, all of the schemes currently operational in Australia (as of 23 May 2012) are net schemes, which pay only for surplus solar power exported to the power grid. Related PostsWhich retailer is offering the best electricity plan for solar customers in Brisbane?
It's good news for the environment and perhaps an indication that consumers are thinking more about energy conservation and switching to energy-saving light bulbs, sockets and appliances. This infographic is a fantastic resource for all parents expecting a baby and not being experienced in bathing their little one.
As the holiday season approaches, millions of Americans will be taking to the skies or to the roads for travel. Ultimate Guide to Sleeping During Pregnancy , Learn about why sleep is important and cause of bad sleep.
This infographic lists the different baby habits a parent should watch out for on each month of growth. The data extracted from the ODYSSEE database and used in the graphs are: the energy consumption by end uses, stock of dwellings, the average floor area, the number of large electrical appliances, the share of central heating. Unit consumption per dwelling for space heating with climatic corrections, Unit consumption of hot water per dwelling, Unit consumption per dwelling for cooking, Unit consumption per m2 for space heating with climatic corrections, Stock of dwellings (permanently occupied). Part of these improvements occurred in the area of space heating due to better thermal performance of buildings encouraged by mandatory efficiency standards for new buildings, and a larger penetration of high efficiency boilers (e.g. For large appliances, the improvement in energy efficiency results from technical improvement driven by EU mandatory Directives on labelling and voluntary agreements with equipment manufacturers. This approach overestimates theA  impact of building regulations as it is well known, but not well quantified , that the actual unit of new dwellings is higher than this consume more than this theoretical consumption, because of non compliance and rebound effects (the fact that in well insulated dwellings occupants tend to have a higher indoor temperature than in less insulated dwellings).
Over the same period, final household electricity consumption increased faster, at an annual growth rate of 1.7%. The share of electricity for lighting and appliances increased from 10% to 15% in 2009 compared to 1990.
However, part of this improvement was offset by increased number of electrical A appliances, larger homes and the diffusion of central heating[7] .
Central heating (around 85% of EU dwellings in 2009) , which includes district heating, block heating, individual boiler heating and electric heating, implies that all the rooms are well heated, as opposed to room heating, where generally a stove provides heat to the main room only.
Solar water heaters can represent a good economical and environmental solution mainly for southern countries which benefit from a good solar irradiation. Here we learnt that the amount of energy a 1kW system produces varies depending on where it is located in Australia. Here we also learnt that the amount of energy the typical home consumes varies depending on where it is located in Australia. If the green generation line is higher at any point than the red consumption line, you are generating a surplus of power, and hence feeding that electricity back into the grid. The attentive eye will notice that a 1.5kW system is only producing just a touch over 1kW of power at its peak.
As you can see, this is above the red line for the majority of daylight hours, meaning you will be exporting a good amount of energy to the grid. Hence, in this situation no power is exported or fed into the grid by your PV system as it is all consumed by your home.
As you can see, this is above the blue line for the majority of daylight hours, meaning you will be exporting a good amount of energy to the grid.
The remaining programs come in essentially 3 forms: State government-backed Solar Feed-in Tariffs (SA, Victoria, and Queensland), 1-for-1 Solar Buybacks through electricity retailers (ACT, Tasmania, Northern Territory), and voluntary Solar Buyback schemes, which offer (often nominal) rates for exported solar power that are lower than retail electricity rates (NSW, WA). As a result, the share of the most efficient appliances (A, A+, A++) has increased significantly: from 6% in 1997 to 94% in 2009 for refrigerators and from 3% to 95% for washing machines, for example[4].
There exist large discrepancies among countries: from few improvements for Hungary, Greece to great improvements for new members such as Slovenia, Poland and Romania with an annual average rate of energy efficiency improvement above 2% over the period 2000-2009 (Figure 7). The combined effect of these three factors was an increase in the average consumption per dwelling by around 0.4% a year each (Figure 6), offsetting 60% of the energy efficiency improvement achieved through technological innovation. It is estimated that the replacement of single room heating by central heating increases the energy required for space heating by about 25A % on average.


The energy suppliers falling under the regulation, have to prove a volume of savings proportional to their market share. In this article, we stitch those two parts together to find the answer to the question of how much a typical home might export to the grid. When the green generation line is below the red consumption line you’re still generating, but not enough to meet your households demand, so you will be buying electricity as per normal to make up the difference. All EU countries have developed thermal regulations for new dwellings, some of them as far as the seventies[1]. Between 2008 and 2009, the household energy consumption has decreased by 0.7% due to the economic crisis.
Most of the savings in energy consumption in the household sector took place because of improvements in space heating technologies and tighter building codes (see also Figure 9 below). For that purpose, they have to implement actions with their consumers to encourage energy savings investments and will receive in exchange certificates; they are also allowed to buy energy saving certificates from suppliers in excess of their obligation. The average PV system will export only around 75% of its rated power to the grid at its peak generation due to the variety of losses associated with the solar panel and inverter efficiency. Hence, in this situation virtually no power is exported or fed into the grid by your PV system (except for a negligible amount at 1pm) as it is all consumed by your home. This will save the money that you would otherwise have paid for electricity.
But because it is often producing more at any given time than the household can consume the 3kW system exports a total of 6.02kWh of energy to the grid. But because it is often producing more at any given time than the household can consume the 3kW system exports a total of 4.02kWh of energy to the grid. Differences between countries can be explained by the high energy efficiency potentials available in these countries due to outdated infrastructures (e.g.
With a top-down approach, the impact of solar heating on the household energy consumption will be measured based on the energy statistics.
The home electricity consumption curve has been calculated from grid wide electricity consumption data for NSW from the Australian Electricity Market Operator (AEMO).
The rate you are paid for your surplus electricity fed into the grid will depend on which state you live in. However, the magnitude of this impact varies with the countries, depending on the number of standards upgrades, their severity and the number of new dwellings (i.e. Gas and electricity are the main energy source in the household energy consumption (39% and 25% respectively in 2009 compared to 29% and 19% in 1990).
Unit consumption per dwelling has decreased in almost all EU countries from 1990 to 2009 except in 6 countries, mainly southern countries (Malta, Greece, Cyprus, Spain), Finland and Croatia (Figure 3).
In this case, the savings come from the fact that one kWh of solar will replace more than one kWh of conventional energy (due to the convention applied in energy statistics to solar heating, namely that there are no losses in conversion). The level of energy saved will depend depending on the type of water heaters replaced (for instance their efficiency).
Figure 9 shows an estimate of the impact of building standards in the unit consumption of dwelling since 1990 for a selection of countries[2].
Heat, from district heating, and coal represent 7% and 3% of the household consumption in 2009 (compared to 10% and 12% in 1990). So looking at both energy consumption for water heating and water consumption trends in the households, one could draw some conclusions on the influence of solar heating penetration.
The savings values have been agreed upon following a process involving various stakeholders on the basis of expert opinions and survey data.
The introduction of new dwellings with better insulation since 1990 contributed to decrease the unit consumption per dwelling at different levels: 12% for Sweden, around 35% for France and Netherlands, 40% for Poland, 50% for Denmark and 70% for Germany. In a bottom-up approach used in national evaluations, solar water heaters are considered as an energy saving technology and thus the saving will be much larger[8].
The details of the calculations are not public but the value of the standardised savings by equipment and actions are published on the Ministry web site[9]. The other factors responsible for the decrease of the unit consumption should be the retrofitting of existing dwellings and the introduction of new more efficient heating appliances (namely, condensing boilers and heat pumps), as well as behavioral savings.



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